Gate-valve.



a. H. BENTON.

GATE VALVE.

nrmouron rlnnn IA! 1, 1901.

Patented Oct. 13,1908.

INVENTOH Gf eai yaEBentmu BY 77 g ATTUhNEYS' GEORGE n. BENTON, OF ms'ruonanmsw JERSEY.

" Specification of Lettera Patent.

Kay 1, 1907. win no, aviaig.

Application Toal lwhom'it moyconcmg Be it known that I, Gnomes H. .Bim'roiw, a-

eitizen ofthe United States,and a resident of Metuchen, in the county-of Middlesexand;

State ofNew Jerse ,V'have invented anew and Improved Gatelve, of'which the following is a full{ clear, and .exact description.

"low convenient opening and c isa The object .0 newand improved gate valve, which is simpie and durable in construction, very efiect- We in operation, and-arranged to readily compensate for'any inequalities in 'the seats and the gate faces, to insure. atall times a firm and accurate of the valve gates on their seats to prevent leakage, and to alosing of the gate valve. y The invention consists of novel features and parts and combinations of the same,

which will be more fully described herein after and then pointed out in the claims- A- practical embodiment of the invention is represented in the accompanying drawings forming a which similar ;c aracters' of [reference indicate corresponding parts in all the views.

sectional side elevation of the, improvement; Fig. 2 is a transverse section of the same on the line 2- 2 of Fig. 1; Fig." 3 is a sectional plan view, of the same on the line-33 of, Fig.- 1; Fig. 4'isa perspective view of one of the valve gates, and Fig. 5

rspective view of aspiiidle plug.

T e body A of the gate valve is provided with o positelydisposed tapering seats Figure 1 is a r by a spindle plugD connected with an operating mechanism ing the s indle for raising and lowering the spindle plug,.th'e said operating'mechanism being. preferabl in the form of a spindle E havin a is hand screw' thread screwing inthe ting D and mounted to turn in the body A, t e upper non-threaded por tio E of the ipindle E extending through a s ufling box and the upper end of t c said nonbreaded portion having a wheel G under the control of the operator, for turn- E to raise or lower the spindle p ug D whenever it is desired ,-to open or close the gate valve, that is, to move t e valve gates C from or to their seats B... The inner or opposite faces of the gates C are provided with dished or concave rethe invention is to provide a are freezto rock thereon in any desi 'tion, it" being-understood that the normal thewalls of the recesses C mnm f t art of this specification,

,middle'or Now by the arrangementspindle plugD actsas a wedge or aspreader. for forcing the gates 'to their seats seats by the s 'ndle .plug

te valve, an the Spindle .plug can be read-' Batented on. s, 190s.

C, C extending inwardly, as plainly. indicatedlin the drawings, and the said gates C cesses (l'and with top andbottom flanges are provided at their front and rear ends with wings C extending intoguidewa s H arra on the inside of the-valve as plainly illustrated in Figs. 2 and 3. hespindle plug-D consists 'ofa' body D and a reduced shank D interiorly 1screwthreaded for. the spindle E to screw in, and the said bod D is provided with convex faces D an similar rear sides D, the said aoes'an'd sides D. and D extending'intothe dished C of the gates C. The faces and sides D and D are curved in such a manner that the C irecpoint of contact between the faces D'- and isapproximatellg' opening throu h the seats By reference to Fig. .5 it wi the faces D "and the sides D are somewhat-wider on the top than on. the bottom, and the curvature on the top towards the contact point is somewhat more abrupt than from the middle down to the bottom of the body D. described the C apart and for allowing the gates to accurately seat themselyes on their seats B whenever theispindle plug D is moved downward, thus compensating tacting faces'of the gates C. By the arrangement plug acts on the gates C at points in the axis of the valve seats B, to insure pressure against the seats B in all directions and reducing friction to a-minimuin, It willalso be seen that-the gate valve ma to hard use and" wear, but sti in every in stance the gates C are firmlly foreed to their enclosing the ily raised and lowered to move the gates C in a like direction. H f- It is further understood that theto and bottom of the body D of the spindle p ug D, engage the flanges C, C, so that when the spindle plug D israised the gates 'C readily move with the" indl'e plug to 0 ii the valve, and when tg e spindle plug is m'oved described the spindle shaped fronts and Y is" be seenthat.

B- for'any inequalities in the seats B or'the con- 1 adapts to be engaged by the valve gates C,

I raised and lowered and pressed be subjected I gates (I in a downward direction.

' ing oppositely dis ose seats,

3 and rovided with a reduced shank for the can u: cheaply manufactured an valve without downward, the bottom thereof by abutting l againstthe bottom flanges C moves the The gate valve shown, and described is com msed-of comparatively few arts, which 5 readily as- Hermits roughf usage of the anger of leakage Having thus described my invention, I claim as new and desire to secure by Letters Patent: i

1. A gate valve,-e0m rising a casing havgates having sliding and, guide movement 1n the casing and adapted to be seated on' the said seats, said gates having dished and tapering recesses in their opposing faces and inwardly extending flanges at the top and bottom of the said recesses, and a spindle plug having its body fitting in the recesses of the gates sel'nhled, and

attac iment of the spindle thereto, the said bodyv being of greater width than thickness and tapering from its upper to its lower end,

- vertica the faces of the body being convex,,the horito about the middle being greater than from the middle to the lower end.

2. A gate valve, coin rising a casing having oppositely disposed 7 guidcways at ri ht angles to the seats, gates adapted to seated on said seats and having dished and tapering recesses in their opposing faces. inwardly extending flan es at the top and bottom of the recesses,;an wings on o posite sides and fittin in the guideways 01 spindd for the attaciment of the spindle thereto and having its bod fitting in the recesses of the gates, said. bod? tapering ,seats and L being of greaterwidth p the casing, and a, V e plug arovided with a reduced shank than thickness ta eri from its 11 ml to 2 f Pl its lower end and aving convex faces.

' In testiniony whereot I liave'signed my name to this specification in the presence of two subscribing witnesses.

v GEORGE H. Barrow \Vitnesses: v

Tmzo'. G. Hosraa, JOHN P. Davis; 

